The observed brightness of a Lambertian surface may be written as the product of an albedo factor, p, and the cosine of the incident angle, cos i. This means that brightness can be written as a product of a term that depends on the material, p, and a term that depends on surface direction, which in turn depends on f and g.
| Game | Time | WPM | Accuracy |
|---|---|---|---|
| 628 | 2017-06-04 16:44:19 | 69.73 | 96% |
| 348 | 2017-05-08 14:54:20 | 67.92 | 94% |